Akai DVP-3470-S Service Manual

DVD PLAYER

Model:

DVP3470S/SK

DVP3570S/SK/DS/DSK/DPSK

SERVICE MANUAL

www.akai.ru

CONTENTS

1. PRECAUTIONS-------------------------------------------------------------------------------------------------------------------------1 1-1 SAFETY PRECAUTIONS-------------------------------------------------------------------------------------------------------------1 1-2 SERVICING PRECAUTIONS ---------------------------------------------------------------------------------------------------------2

1-2-1 General Serving Precautions------------------------------------------------------------------------------------------------2 1-2-2 Insulation Checking Procedure---------------------------------------------------------------------------------------------3

1-3 ESD PRECAUTIONS-----------------------------------------------------------------------------------------------------------------3

2. REFERENCE INFORMATION------------------------------------------------------------------------------------------------------4 2-1 COMPONENT DESCRIPTIONS ------------------------------------------------------------------------------------------------------4

2-1-1 DVD ATAPI Loader ---------------------------------------------------------------------------------------------------------4 2-1-2 NTSC/PAL Digital Video Encoder (CS4955) ----------------------------------------------------------------------------6 2-1-3 DVD Processor Chip (MT1369AE) ---------------------------------------------------------------------------------------8 2-1-4 8-Pin, 24-Bit, 96kHz Stereo D/A CONVERTER (WM8720)-------------------------------------------------------- 17 2-1-5 Serial EEPROM, 2K (256 x 8) (24C16,ST-S08)----------------------------------------------------------------------- 20 2-1-6 8-Megabit (512 x 8) FLASH RAM (29F800)-------------------------------------------------------------------------- 20 2-1-7 512K X 16 Bit X 2 Banks Synchronous DRAM (A43L0616) ------------------------------------------------------- 23

3. PRODUCT SPECIFICATIONS ---------------------------------------------------------------------------------------------------- 26

4. OPERATING INSTRUCTIONS ------------------------------------------ ОШИБКА! ЗАКЛАДКА НЕ ОПРЕДЕЛЕНА. 4-1 BASIC CONNECTIONS -------------------------------------------------------------- ОШИБКА! ЗАКЛАДКА НЕ ОПРЕДЕЛЕНА.

4-2 Selecting Video Mode------------------------------------------------------------------------------------------------------24 4-2 Selecting the desired DVD Menu item---------------------------------------------------------------------------------- 25 4-4 Selecting the desired MP3 folder----------------------------------------------------------------------------------------- 26 4-5 Selecting the desired MP3 title------------------------------------------------------------------------------------------- 27 4-6 Searching---------------------------------------------------------------------------------------------------------------------28 4-7 Resume Play-----------------------------------------------------------------------------------------------------------------29 4-10 Selecting Subtitle Language----------------------------------------------------------------------------------------------31 4-11 Selecting Angle----------------------------------------------------------------------------------------------------------- -32

5. DISASSEMBLY AND REASS EM B LY------------------------------------------------------------------------------------------- 27

6. TROUBLESHOOTING ------------------------------------------------------------------------------------------------------------- 28

7. ELECTRICAL PART LIST --------------------------------------------------------------------------------------------------------- 29

8. BLOCK DIAGRAM----------------------------------------------------------------------------------------------------------------- 35

9. CIRCUIT DIAGRAMS-------------------------------------------------------------------------------------------------------------- 36

10. WIRING DIAGRAM--------------------------------------------------------------------------------------------------------------- 44

1-1 Safety Precautions

1) Before returning an instrument to the customer, always

make a safety check of the entire instrument, including, but not limited to, the following items:

(1) Be sure that no built-in protective devices are defective

or have been defeated during servicing. (1) Protective shields are provided to protect both the technician and the customer. Correctly replace all missing protective shields, including any remove for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including, but not limited to, nonmetallic control knobs, insulating fish papers, adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not operate this instrument or permit it to be operated without all protective devices correctly installed and functioning.

(2) Be sure that there are no cabinet opening through which

adults or children might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, excessively wide cabinet ventilation slots, and an improperly fitted and/or incorrectly secured cabinet back cover.

(3) Leakage Current Hot Check-With the instrument

completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards institute (ANSI) C101.1 Leakage.

Current for Appliances and underwriters Laboratories (UL) 1270 (40.7). With the instrument’s AC switch first in the ON position and then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle brackets, metal cabinets, screwheads, metallic overlays, control shafts, etc.), especially and exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5mA. Reverse the instrument power cord plug in the outlet and repeat the test.

AC Leakage Test

Any measurements not within the limits specified herein indicate a potential shock hazard that must be eliminated before returning the instrument to the customer.

(4) Insulation Resistance Test Cold Check-(1) Unplug the

power supply cord and connect a jumper wore between the two prongs of the plug. (2) Turn on the power switch of the instrument. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and all exposed metallic cabinet parts on the instrument, such as screwheads, antenna, control shafts, handle brackets, etc. When an exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 megohm. When there is no return path to the chassis, the reading must be infinite. If the reading is not within the limits specified, there is the possibility of a shock hazard, and the instrument must be re-pared and rechecked before it is returned to the customer.

Insulation Resistance Test

2) Read and comply with all caution and safety related

notes non or inside the cabinet, or on the chassis.

3) Design Alteration Warning-Do not alter of add to the

mechanical or electrical design of this instrument. Design alterations and additions, including but not limited to, circuit modifications and the addition of items such as auxiliary audio output connections, might alter the safety characteristics of this instrument and create a hazard to the user. Any design alterations or additions will make you, the service, responsible for personal injury or property damage resulting there from.

4) Observe original lead dress. Take extra care to assure

correct lead dress in the following areas: (1) near sharp edges, (2) near thermally hot parts (be sure that leads and components do not touch thermally hot parts), (3) the AC supply, (4) high voltage, and (5) antenna wiring. Always inspect in all areas for pinched, out-of-place, or frayed wiring. Do not change spacing between a component and the printed-circuit board, Check the AC power cord for damage.

5) Components, parts, and/or wiring that appear to have overheated or that are otherwise damaged should be replaced with components, parts and/or wiring that meet original specifications. Additionally determine the cause of overheating and/or damage and, if necessary, take corrective action to remove and potential safety hazard.

6) Product Safety Notice-Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by shading, an ( (

) on schematics and parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might created shock, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

) or a

1-2 Servicing Precautions

CAUTION: Before servicing Instruments covered by this

service manual and its supplements, read and follow the Safety Precautions section of this manual.

Note: If unforeseen circument create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember; Safety First

1-2-1 General Serving Precautions

(1) a. Always unplug the instrument’s AC power cord from

the AC power source before (1) removing or reinstalling any component, circuit board, module or any other instrument assembly. (2) disconnecting any instrument electrical plug or other electrical connection. (3) connecting a test substitute in parallel with an electrolytic capacitor in the instrument.

b. Do not defeat any plug/socket B+ voltage interlocks

with which instruments covered by this service manual might be equipped.

c. Do not apply AC power to this instrument and/or any

of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

d. Always connect a test instrument’s ground lead to

the instrument chassis ground before connecting th e test instrument positive lead. Always remove the test

instrument ground lead last. Note: Refer to the Safety Precautions section ground lead last.

(2) The service precautions are indicated or printed on the

cabinet, chassis or components. When servicing, follow the printed or indicated service precautions and service materials.

(3) The components used in the unit have a specified flame

resistance and dielectric strength. When replacing components, use components which have the same ratings, by ( circuit diagram are important for safety or for the characteristics of the unit. Always replace them with the exact replacement components.

(4) An insulation tube or tape is sometimes used and some

components are raised above the printed wiring board for safety. The internal wiring is sometimes clamped to prevent contact with heating components. Install such elements as they were.

(5) After servicing, always check that the removed screws,

components, and wiring have been installed correctly

) or by ( ) in the

and that the portion around the serviced part has not been damaged and so on. Further, check the insulation between the blades of the attachment plus and accessible conductive parts.

1-2-2 Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn the power ON. Connect the insulation resistance meter

1-3 ESD Precautions

(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (see note) should be more than 1 Megohm.

Note: Accessible conductive parts include metal panels, input terminals, earphone jacks, etc.

Electrostatically Sensitive Devices (ESD)

Some semiconductor (solid static electricity) devices can be damaged easily by static electricity. Such compo9nents commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques of component damage caused by static electricity.

(1) immediately before handling any semiconductor

components or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

(2) after removing an electrical assembly equipped with

ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

(3) Use only a grounded-tip soldering iron to solder or

unsolder ESD device.

(4) Use only an anti-static solder removal devices. Some

solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESD devices.

(5) Do not use freon-propelled chemicals. These can

generate electrical charges sufficient to damage ESD devices.

(6) Do not remove a replacement ESD device from its

protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials).

(7) Immediately before removing the protective materials

from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device will be installed.

CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

(8) Minimize bodily motions when handling unpackaged

replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).

2. Reference Information

2-1 Component Descriptions

2-1-1 DVD SANYO HD60 PUH

Connector Pin Definition

I/F Signals I/O Pin #

F- 1 F+ 2 T+ 3 T- 4 C 5

D 6 CD/DVD 7

RF 8 A 9 B 10 F 11 GND-PD 12

VC 13

VCC 14 E 15

NC 16 VR-CD 17 VR-DVD 18 LD-CD 19 MD 20 HFM 21 NC 22 LD-DVD 23 GND-LD 24

4. Block Diagram

Disc

Disc motor unit

Spindle Motor

BA6208

Spindle Motor Drive

Focus Coil

Laser pickup

Track Coil

BA5954FP

4ch motor Drive

MT1369 (RF AMP) Laser Driver Equalizer Error Gen

Sied Motor

Loading Motor

MT1369

(Decode/Servo)

ATAPI

Buffer Manager

Demodulator

Error Correction

PLI

Focus & Tracking

AuDdio D/A WM8720

SDRAM 1*16MHzX2

Video D/A

CS4955

1/F Conn (frant pannel)

80c52

System Controller

Spindle motor single for CLV

Fiash

Memory

8Mbit

2-1-2 NTSC/PAL Digital Video Encoder (CS4955)

FEATURES

• Six DACs providing simultaneous composite, S-video, and RGB or Component YUV outputs

• Programmable DAC output currents for low

imped-ance(37.5Ω) and high impedance(150

Ω)loads.

• Multi-standard support for NTSC-M, NTSC-JAPAN, PAL (B, D, G, H, I, M, N, Combination N)

• ITU R.BT656 input mode supporting EAV/SAV codes and CCIR601 Master/Slave input modes

• Porgrammable HSYNC and VSYNC timing

• Multistandard Teletext(Europe, NABTS, WST)

support

• VBI encoding support

• Wide-Screen Signaling (WSS) support, EIA-JCPX1204)

• NTSC closed caption encoder with interrupt

• CS4955 supports Macrovision copy protection Version 7

• Host interface configurable for parallel or I

compatible operation

• On-chip voltage reference generator

• +.3.3V or +5V operation, CMOS, low-power modes,

tri-state DACs Ordering Information CS4955-CQ 48-pin TQFP

DESCRIPTION

The CS4955 provides full conversion from digital video formats YcbCr or YUV into NTSC and PAL Composite, Y/C (S-video) and RGB, or YUV analog video. Input formats can be 27MHz 8-bit YUV, 8-bit YcbCr, or ITUR.BT656 with support for EAV/SAV codes. Video output can be formatted to be compatible with NTSC-M, NTSC-J, PAL-B, D, G, H, I, M, N, and Combination N systems. Closed Caption is supported in NTSC. Teletext is supported for NTSC and PAL.

Six 10-bit DACs provide two channels for an S-Video output port, one or two composite video outputs, and three RGB or YUV outputs. Two-times oversampling reduces the output filter requirements and guarantees no DAC-ralated modulation components within the specified bandwidth of any of the supported video standards.

Parallel or high-speed I parallel interface doubles as a general purpose I/O port when the CS4954 is in I board area.

C compatible conpatible control interfaces are provided for flexibility in system design. The

C mode to help conserve valuable

PIN DESCRIPTIONS Pin Name Pin Number Type Description V[7:0] 8,7,6,5,4,3,2,1 IN Digital video data inputs CLK 29 IN 27MHz input clock PADDR 16 IN Address enable line XTAL_IN 15 IN Subcarrier crystal input XTAL_OUT 14 OUT Subcarrier crystal input HSYNC/CB 10 I/O Active low horizontal sync, or composite blank

signal VSYNC 11 I/O Active low vertical sync FIELD/CB 9 OUT Video field ID. Selectable polarity or composite

blank RD 27 IN Host parallel port read strobe, active low WR 28 IN Host parallel port write strobe, active low PDAT[7:0] 19,20,21,22,23,

I/O Host parallel port/general purpose I/O

24,25,26 SDA 32 I/O I2C data SCL 33 IN I2C clock input CVBS 44 CURRENT Composite video output Y 48 CURRENT Luminance analog output C 47 CURRENT Chrominance analog output R 39 CURRENT Red analog output G 40 CURRENT Green analog output B 43 CURRENT Blue analog output VREF 38 I/O Internal voltage reference output or external

reference input ISET 37 CURRENT DAC current set TTXDAT 30 IN Teletext data input TTXRQ 31 OUT Teletext request output INT 12 OUT Interrupt output, active high RESET 34 IN Active low master RESET TEST 13 IN TEST pin. Ground for normal operation VAA 36,41,46 PS +5V or +3.3V supply(must be same as VDD) GNDD 18 PS Ground VDD 17 PS +5V or 3.3V supply (must be same as VAA)

GNDA 35,42,45 PS Ground 2-1-3 DVD Processor Chip (MTK1369AE)

* Features

z Single-chip DVD video decoder in a 208-pin PQFP package z Supports MPEG-1 system and MPEG-2 program streams z Programmable multimedia processor architecture z Compatible with Audio CD, Video CD, VCD 3.0, and Super Video CD (SVCD) z DVD Navigation 1 z Built-in content Scrambling System (CSS)

- Audio

z Built-in Karaoke key-shift functio n z DolbyTM Digital 2-channel down mix audio output for DolbyTM z Dolby Pro Logic z Linear PCM streams for24 bit / 96KHz z Concurrent S/PDIF out and 2-channel audio output z Sensaura Dolby Digital Virtual Surround z DTS Digital Surround 2-channel down mix stereo output z S/PDIF output for encoded AC-3, DTS Digital output or Linear PCM

- Peripheral

z Glueless interface to DVD loaders (ATAPI or A/V bus I/F) z Bi-directional 12C audio interface z 8 general-purpose auxiliary ports z Single 27MHz clock input

- Smart Technology

z SmartZoomTM for motion zoom & pan z SmartZoomTM for NTSC to PAL conversion and vice versa

SmartZoomTM for video error concealment

* Functional Description

* Pinout Diagram

PIN DESCRIPTON

PIN Symbol Type Description

1 IREF Analog Input 2 PLLVSS Ground Ground for data PLL and related analog circuitry

3 LPIOP Analog output Positive output of the low pass filter 4 LPION Analog output Negative output of the low pass filter 5 LPFON Analog output Negative output of loop filter amplifiter 6 LPFIP Analog input Positive input of loop filter amplifier 7 LPFIN Analog input Negative input of loop filter amplifier 8 LPFOP Analog output Positive output of loop filter amplifier

9 JITFO Analog output RF jitter meter output 10 JITFN Analog input Negative input of the operation amplifier for RF jigger meter 11 PLLVDD3 Power Power for data PLL and related analog circuitry 12 FOO Analog output Focus servo output. PDM output of focus servo compensator 13 TRO Analog output Tracking servo output.PDM output of tracking servo compensator

14 TROPENPWM Analog outpu

15 PWMOUT2 Analog outpu The general PWM output 16 DVDD2 Power 2.5V power 17 DMO Analog outpu Disk motor control output.PWM output 18 FMO Analog outpu Feed motor control. PWM output 19 FG Inout, pull up Motor Hall sensor input 20 DVSS Ground Ground 21 HIGHA0 Inout, pull up Microcontroller address 8 22 HIGHA1 Inout, pull up Microcontroller address 9 23 HIGHA2 Inout, pull up Microcontroller address 10 24 HIGHA3 Inout, pull up Microcontroller address 11 25 HIGHA4 Inout, pull up Microcontroller address 12 26 HIGHA5 Inout, pull up Microcontroller address 13 27 DVSS Ground Ground 28 HIGHA6 Inout, pull up Microcontroller address 14 29 HIGHA7 Inout, pull up Microcontroller address 15 30 AD7 Inout Microcontroller address/data 7 31 AD6 Inout Microcontroller address/data 6 32 AD5 Inout Microcontroller address/data 5 33 AD4 Inout Microcontroller address/data 4 34 DVDD3 Power 3.3V power 35 AD3 Inout Microcontroller address/data 3 36 AD2 Inout Microcontroller address/data 2 37 AD1 Inout Microcontroller address/data 1 38 AD0 Inout Microcontroller address/data 0 39 IOA0 Inout, pull up Microcontroller address 0/GPIO0 40 IOA1 Inout, pull up Microcontroller address 0/GPIO1 41 DVDD2 Power 2.5V power 42 IOA2 Inout, pull up Microcontroller address 0/GPIO2 43 IOA3 Inout, pull up Microcontroller address 0/GPIO3 44 IOA4 Inout, pull up Microcontroller address 0/GPIO4 45 IOA5 Inout, pull up Microcontroller address 0/GPIO5 46 IOA6 Inout, pull up Microcontroller address 0/GPIO6 47 IOA7 Inout, pull up Microcontroller address 0/GPIO7 48 A16 Outpu Flash address 16 49 A17 Output Flash address 17 50 IOA18 Inout Flash address 18 / GPIO10 51 IOA19 Inout Flash address 19 / GPIO11 52 DMVSS Ground Ground for DRAM clock circuitry 53 DMVDD3 Power Power for DRAM clock circuitry

Current reference input.it generate reference current for data PLL Connect an external 100K resistor to this pin and PLLVSS.

Tray open output,co nt r ol l ed b y m i croco ntroller. This is PWM output for TRWMEN TRWMEN

27Hrw2=0

27hRW2=1 or is digital output for

PIN Symbol Type Description

54 ALE Inout,pull up Microcontroller address latch enable 55 IOOE# Inout Flash output enab le,active low /GPIO13 56 IOWR# Inout Flash write enable,active low /GPIO17 57 IOCS# Inout,pull up Flash chip select,active low /GPIO18 58 DVSS Ground Ground 59 UP1_2 Inout,pull up Microcontroller port 1-2 60 UP1_3 Inout,pull up Microcontroller port 1-3 61 UP1_4 Inout,pull up Microcontroller port 1-4 62 UP1_5 Inout,pull up Microcontroller port 1-5 63 UP1_6 Inout,pull up Microcontroller port 1-6 64 DVDD3 Power 3.3V power 65 UP1_7 Inout,pull up Microcontroller port 1-7 66 UP3_0 Inout,pull up Microcontroller port 3-0 67 UP3_1 Inout,pull up Microcontroller port 3-1 68 INT0# Inout,pull up Microcontroller in terrupt 0,active low 69 IR Input IR control signal input 70 DVDD2 Power 2.5V power 71 UP1_4 Inout Microcontroller port 3-4 72 UP1_5 Inout Microcontroller port 3-5 73 UWR# Inout,pull up Microcontroller write strobe,active low 74 URD# Inout,pull up Microcontroller read strobe,active low 75 XTALI Input Crystal input,27MHz 76 XTALO Output Crystal output 77 DVSS Ground Ground 78 RD7 Inout DRAM data 7 79 RD6 Inout DRAM data 6 80 RD5 Inout DRAM data 5 81 RD4 Inout DRAM data 4 82 DVDD2 Power 2.5V power 83 RD3 Inout DRAM data 3 84 RD2 Inout DRAM data 2 85 RD1 Inout DRAM data 1 86 RD0 Inout DRAM data 0 87 RWE# Output DRAM write enable,active low 88 CAS# Output DRAM column address strobe,active low 89 RAS# Output DRAM row address strobe,active low 90 RCS# Output DRAM chip select,active low 91 BA0 Output DRAM bank address 0 92 DVDD3 Power 3.3V power 93 RD15 Inout,pull up/down DRAM data 15 94 RD14 Inout,pull up/down DRAM data 14 95 RD13 Inout,pull up/down DRAM data 13 96 RD12 Inout,pull up/down DRAM data 12 97 DVSS Ground Ground 98 RD11 Inout,pull up/down DRAM data 1 1 99 RD10 Inout,pull up/down DRAM data 10

100 RD9 Inout,pull up/down DRAM data 9 101 RD8 Inout,pull up/down DRAM data 8 102 VPVDD3 Power Power for varipitch VCO circuitry 103 VCOCIN Analog input Connect capacitor for compensator loop filter 104 VPVSS Ground Ground for varipitch VCO circuitry 105 DVSS Ground Ground 106 CLK Output DRAM clock 107 CLE Output DRAM clock enable 108 RA11 Output DRAM address bit 11 or audio serial data 3 (channel 7/8) 109 RA9 Output DRAM address 9 110 RA8 Output DRAM address 8 111 DVDD2 Power 2.5V power 112 RA7 Output DRAM address 7

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